In the preamble of the Constitution, we are told that we are constantly moving toward a more perfect union. And while people in every age think they're living in a time of transition, ours truly is an age of transition when it comes to the rights of gay Americans. It's in the zeitgeist -- in the courts, in pop culture, in the business world and in people's voices online and offline. On Sunday, the Oprah Winfrey Network is featuring a lineup of programs about being gay in America. It begins with Oprah's Next Chapter -- with conversations between Oprah and gay celebrities including Wanda Sykes, Jesse Tyler Ferguson and Dan Bucatinsky -- and continues with the premiere of Bridegroom, a documentary from Designing Women creator Linda Bloodworth-Thomason.